Lignocellulose-Montmorillonite Nanocomposite as Adsorbents of Pb(II) in Aqueous Solution: The Capacity for Desorption and Regeneration

Xiaotao Zhang1, Lifeng Liu2, Li Wang2 and Ximing Wang2,*

1College of Science, Inner Mongolia Agricultural University, Hohhot 010018, P.R. China

2College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot 010018, P.R. China

*Corresponding author: Fax: +86 471 4313037; Tel: +86 13804711097; E-mail:


Lignocellulose-montmorillonite nanocomposite was used as adsorbent for the removal of Pb(II) from aqueous solution. The effects of each desorption parameter were discussed, the optimal desorption capacity of Pb(II) was found to be 105.2 mg/g by using HNO3 as regenerating agent, when the optimal initial HNO3 concentration was 0.03 M, the optimal desorption temperature was 30 ºC, the optimal desorption time was 0.5 h. SEM, XRD and FTIR were used to characterized the type of functional groups for lignocellulose-montmorillonite and Pb(II) ions binding process. In addition, five adsorption/desorption cycles were tested and confirmed that lignocellulose-montmorillonite was suitable for regeneration, it indicated that lignocellulose-montmorillonite can be utilized as a low-cost sorbent for the removal of Pb(II) ions from wastewater.


Desorption, Lignocellulose-montmorillonite, Nanocomposite, Pb(II), Regeneration.

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